hot melt roofing solution to hiscox's new headquarters by make architects #perfectroof

8 Steps to the perfect roofPresentation

01.10.15

Hiscox Building

2 Section Subject

Hiscox Building –Brief

Integrity

Excellence

Courage

Quality

Respect

• Bespoke office building for owner occupiers Hiscox • Contemporary design which reflects Hiscox brand values

3 Section Subject

Site–Location

York

10 minute walk20 minute walk

Train station

York Minster

4 Section Subject

Site–Local context

Site

City Wall

Black Swan

Hungate Masterplan

The Stonebow

Site

Aldwark

St. Saviour’s Place

Peasholme Green

Foss

Spen Lane

Dundas Street

St. Cuthbert’s Church

York Minster

St Anthony’s Hall

5 Section Subject

Site–History

The Wool Market, 1849

6 Section Subject

Site–Archeology

7 Section Subject

Site

Site–Masterplan

8 Section Subject

Concept–Weave & the wall

9 Section Subject

Design–Form

Ground floor Level 01

Level 03Level 02

Ground floor atrium

Level 03 roof terrace

Design–Plan

Design–Facade - Brick

/Page No. 14 Black Swan Sketchbook no. 5 FMDC Compiled façade information - draft stage d FMDC 035 Draft 1 25-Sep-13

3d sketchup model of typical bay Scale 1:5@A3 approx.




3d sketchup model of typical bay Scale 1:5@A3 approx. /Page No. 14 Black Swan Sketchbook no. 5 FMDC Compiled façade information - draft stage d FMDC 035 Draft 1 25-Sep-13


Design–Facade - Brick

/Page No. 4 /Black Swan /Sketchbook 2 /Glazed wall options study /FMDC 035 /Draft 1 /07-Aug-13

/Option 1 - verticals at 2m centres without horizontals 1:200 & 1:20@A3 approx.

Option 1 - verticals at 2m centres without horizontals

• 400x200mm steel oval sections at 2m centres, spanning

13.5m, gravity supported from the ground.

• DGU’s with no transoms at 2m wide by 4.25m high.

• Heat strengthened glass required structurally.

• The glass is too thick to span 3m horizontally, hence the 2m

spacing of the verticals.

• Likely to be a more expensive solution than option 2.

• Primary frame columns at 6m centres. Façade divorced from

primary structure.

• No/limited connections between primary frame and façade

oval sections. The ovals in front of columns could be propped

to the structure behind resulting in the same size ovals but

with thinner wall thicknesses (potential small saving).

• Achieves a vertical aesthetic and a ‘special’ exciting design.

• 500 Brook Drive, Green Park, Reading provides good

precedent.

Curved glass procurement options @ 2m wide x 4.25m high.

• Suppliers include Seele, Fini Glass and Cricursa.

• Roller wave issues with heat strengthened glass, therefore a

risk of poorer optical quality at corners.

• Laminated heat strengthened glass required to both internal

and external panes at ground floor and to ensure safety and

redundancy in the event of breakage. This results in further

issues with optical quality due to the multiple layers of roller

wave.

/Page No. 4 /Black Swan /Sketchbook 2 /Glazed wall options study /FMDC 035 /Draft 1 /07-Aug-13

/Option 1 - verticals at 2m centres without horizontals 1:200 & 1:20@A3 approx.

Option 1 - verticals at 2m centres without horizontals

• 400x200mm steel oval sections at 2m centres, spanning

13.5m, gravity supported from the ground.

• DGU’s with no transoms at 2m wide by 4.25m high.

• Heat strengthened glass required structurally.

• The glass is too thick to span 3m horizontally, hence the 2m

spacing of the verticals.

• Likely to be a more expensive solution than option 2.

• Primary frame columns at 6m centres. Façade divorced from

primary structure.

• No/limited connections between primary frame and façade

oval sections. The ovals in front of columns could be propped

to the structure behind resulting in the same size ovals but

with thinner wall thicknesses (potential small saving).

• Achieves a vertical aesthetic and a ‘special’ exciting design.

• 500 Brook Drive, Green Park, Reading provides good

precedent.

Curved glass procurement options @ 2m wide x 4.25m high.

• Suppliers include Seele, Fini Glass and Cricursa.

• Roller wave issues with heat strengthened glass, therefore a

risk of poorer optical quality at corners.

• Laminated heat strengthened glass required to both internal

and external panes at ground floor and to ensure safety and

redundancy in the event of breakage. This results in further

issues with optical quality due to the multiple layers of roller

wave.

Design–Facade - Glass

Design–Interior

18 Section Subject

Design–Interior

Terrace–Level 3

Terrace & roof–Flat roof construction

Questions–

1. What were the particular challenges for roofing the building?

2. How did the use of hot melt help with the challenges?

Challenges–

1. Programme • Short construction programme - 14 months

• Simple, fast & easy to install

• Rapid setting allows for fast turn around for follow on trades

• Tried & tested system

Challenges–

1. Programme 2. Budget

• Design & Build contract

• Variety of procurement options

• Hot melt system approximately 25% cheaper than a cold applied liquid plastic system

Challenges–

1. Programme 2. Budget3. Curved geometry

Challenges–

1. Programme 2. Budget3. Curved geometry4. Sustainable

• Breeam

• Recycled content of Permatec is 43%

• Use with green roof & PV panels

Challenges–

1. Programme 2. Budget3. Curved geometry4. Sustainable5. Variety of details

Challenges–Detail 1


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Penetrations: The magical Pitch Pocket

Pitch pockets used for all vertical penetrations. Services / handrails / posts / I beams etc

1. Minimum 50mm galvanised metal formwork bonded into hot melt.

2. This is then secured with more hot melt or mechanically fixed.

3. Filled with PermaTEC hot melt

4. Protection felt then covers pitch pocket

Challenges–Bespoke & standard details

Summary–

hot melt roofing solution to hiscox's new headquarters by make architects #perfectroof

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